Nonlinear Regression for Multiple Populations

I am studying how rapidly different herbicides break down (degrade) in different soils, and have figured out how to do nonlinear regression for each herbicide and soil separately using the 'Nonlinear Regression' platform in JMP 10. But ultimately I want to be able to compare regression curves (ended up using exponential decay models) from both different soils and/or different herbicides. I'd like to at least be able to do this graphically - e.g. plot different exponential decay curves for several soil types or herbicides on the same graph. Is this possible in JMP?re